<!doctype html>
<html>
<body>
<canvas id="can" width="400" height="400" style="background:Black"></canvas>
<script>
var sn = [42, 41], dz = 43, fx = 1, n, ctx = document.getElementById("can").getContext("2d");
function draw(t, c) {
ctx.fillStyle = c;
ctx.fillRect(t % 20 * 20 + 1, Math.floor(t / 20) * 20 + 1, 18, 18);
}
document.onkeydown = function (e) {
fx = sn[1] - sn[0] == (n = [-1, -20, 1, 20][(e || event).keyCode - 37] || fx) ? fx : n;
};
!function () {
sn.unshift(n = sn[0] + fx);
if (sn.indexOf(n, 1) > 0 || n < 0 || n > 399 || fx == 1 && n % 20 == 0 || fx == -1 && n % 20 == 19) {
return alert("GAME OVER");
}
draw(n, "Lime");
if (n == dz) {
while (sn.indexOf(dz = Math.floor(Math.random() * 400)) >= 0);
draw(dz, "Yellow");
} else {
draw(sn.pop(), "Black");
}
setTimeout(arguments.callee, 130);
}();
</script>
</body>
</html>
代码-JS之三十行贪吃蛇
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转载自blog.csdn.net/qq_39723600/article/details/83239582
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